Mathematics
Umberto P.'s user avatar
Umberto P.'s user avatar
Umberto P.'s user avatar
Umberto P.
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All Questions Answers
Score Newest
answer
53
Does L'Hôpital's work the other way?
Nov 22, 2013
answer
36
Trouble understanding only one way implication truth
Feb 5, 2018
answer
35
If a compact set is covered by a finite union of open balls of same radii, can we always get a lesser radius?
Jan 22, 2018
answer
28
Sum of reciprocal of primes
Aug 16, 2016
answer
28
Is $\int_{\sin x}^{\cos x}x\, dx$ not a well-defined integral?
Oct 26, 2018
answer
26
Unique weak solution to the biharmonic equation
Sep 19, 2014
answer
22
Evaluate $\lim_{x\to 0} \frac{a^x -1}{x}$ without applying L'Hopital's Rule.
Apr 17, 2017
answer
19
About absolute continuity $\Rightarrow$ null set maps to null set
Aug 19, 2016
answer
18
For every $\epsilon>0$ there exists $\delta>0$ such that $\int_A|f(x)|\mu(dx) < \epsilon$ whenever $\mu(A) < \delta$
Oct 3, 2013
answer
18
If $x \in\mathbb{Z}$ has the property that for all $m \in\mathbb Z$, $mx = m$, then $x = 1$
Feb 6, 2015
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